<html>
<head>
	<meta charset="UTF-8">
	<meta content="IE=edge" http-equiv="X-UA-Compatible">
	<meta content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no, width=device-width" name="viewport">
	<title>4225：lamp</title>
	<!-- css -->
	<link href="../css/base.min.css" rel="stylesheet">
	<link href="../css/project.min.css" rel="stylesheet">
	
	<!-- favicon -->
	<!-- ... -->
</head>
<body class="page-brand">
	<header class="header header-transparent header-waterfall ui-header">
		<ul class="nav nav-list pull-left">
			<li>
				<a data-toggle="menu" href="#menu">
					<span class="icon icon-lg">menu</span>
				</a>
			</li>
		</ul>
		<a class="header-logo header-affix-hide margin-left-no margin-right-no" data-offset-top="213" data-spy="affix">lamp</a>
		<span class="header-logo header-affix margin-left-no margin-right-no" data-offset-top="213" data-spy="affix">lamp</span>
	</header>
	<nav aria-hidden="true" class="menu" id="menu" tabindex="-1">
		<div class="menu-scroll">
			<div class="menu-content">
				<a class="menu-logo" href="../index.html">BZOJ离线题库</a>
				<ul class="nav">
					<li>
						<a class="waves-attach" data-toggle="collapse" href="#problems">题目</a>
						<ul class="menu-collapse collapse in" id="problems">
							<li>
								<a class="waves-attach" href="../index.html">主页</a>
							</li>
							<li>
								<a class="waves-attach" href="../list.html">题目列表</a>
							</li>
						</ul>
					</li>
					<li>
						<a class="collapsed waves-attach" data-toggle="collapse" href="#about">关于</a>
						<ul class="menu-collapse collapse" id="about">
							<li>
								<a class="waves-attach" href="../about.html">关于此项目</a>
							</li>
						</ul>
					</li>
					
				</ul>
			</div>
		</div>
	</nav>
	<main class="content">
		<div class="content-header ui-content-header">
			<div class="container">
				<h1 class="content-heading">
                lamp                </h1>
                <p>时间限制：60s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：256MB</p>			</div>
		</div>
		<div class="container">
			<section class="content-inner margin-top-no">
				<div class="row">
					<div class="col-lg-13 col-md-13">
						<div class="card margin-bottom-no">
							<div class="card-main">
								<div class="card-inner">
									
                                <h3>题目描述</h3><p><div>有两堵墙A, B平行放置，两堵墙相隔10m远。在A墙的底部放置有一个点光源，且A墙上有n个玻璃窗，B墙上有m个玻璃窗，每个窗户都可以发生镜面反射，反射遵循光的反射定律（入射角出射角相等），但窗户的边框上不能反射光线。每个窗户都形如一个平行于坐标系的矩形，分别考虑两堵墙，看成一个平面后建立平面直角坐标系（单位长度m），x为水平方向，y为竖直方向。而每个窗户所代表的矩形用左下角坐标(x1, y1)和右上角坐标(x2, y2)给出，同一堵墙上没有任意两个窗户在边框以内的部分有交点（允许边框上有交点）。两堵墙的坐标系的原点(0, 0)相互正对。A墙底部的点光源位于A墙的(0, 0)处，保证不会在A墙的某个窗户的边界上或内部。求在A墙上有多少个窗户能接收到点光源的光线（仅通过窗户的反射）。PS.光线未经过反射前可以照射到B墙的每一个点上，而不能照射到A墙的任意一个点上。具体见样例解释。</div>
<p></p></p><hr/><h3>输入格式</h3><p><div>第一行两个正整数n, m分别代表两堵墙上的窗户数量。</div>
<div>接下来n行每行四个整数x1, y1, x2, y2，给定A墙上的n个矩形窗户。</div>
<div>接下来m行每行四个整数x1, y1, x2, y2，给定B墙上的m个矩形窗户。</div>
<p></p></p><hr/><h3>输出格式</h3><p><div>第一行一个正整数ans表示有ans个窗户能接收到光线（数据保证ans &gt;= 1）。</div>
<div>第二行ans个整数表示能接收到光线的A墙窗户的编号，按照输入的顺序从1到n标号，从小到大升序输出。</div>
<div></div>
<p></p></p><hr/><h3>样例输入</h3><pre>3 3
-1 2 1 4
-1 5 1 7
-3 8 -2 20
-1 1 1 2
-1 4 1 5
-1 7 1 10
</pre><hr/><h3>样例输出</h3><pre>2
1 2
</pre><hr/><h3>提示</h3><p><p><img src="../file/4225_0.png" width="688" height="758" alt="" /></p>
<p><span style="text-indent: 20.5pt; font-size: 12pt; font-family: 宋体;">对于</span><span lang="EN-US" style="text-indent: 20.5pt; font-size: 12pt; font-family: Consolas;">100%</span><span style="text-indent: 20.5pt; font-size: 12pt; font-family: 宋体;">的数据，</span><span lang="EN-US" style="text-indent: 20.5pt; font-size: 12pt; font-family: Consolas;">1 &lt;= n &lt;= 600, 1 &lt;= m &lt;= 600, -1000 &lt;= x1 &lt; x2&nbsp; &lt;= 1000, 0 &lt;= y1 &lt; y2 &lt;= 1000</span><span style="text-indent: 20.5pt; font-size: 12pt; font-family: 宋体;">。</span></p></p><hr/><h3>题目来源</h3><p>没有写明来源</p>
								</div>
							</div>
						</div>
					</div>
				</div>
				
				
			</section>
		</div>
	</main>

	<div class="fbtn-container">
		<div class="fbtn-inner">
			<a class="fbtn fbtn-lg fbtn-brand-accent waves-attach waves-circle waves-light waves-effect" data-toggle="dropdown" aria-expanded="true"><span class="fbtn-text fbtn-text-left">Menu</span><span class="fbtn-ori icon">apps</span><span class="fbtn-sub icon">close</span></a>
			<div class="fbtn-dropup">
				<a class="fbtn fbtn-brand waves-attach waves-circle waves-light waves-effect" href="../list.html" target="_self"><span class="fbtn-text fbtn-text-left">题目列表</span><span class="icon">menu</span></a>
				<a class="fbtn fbtn-green waves-attach waves-circle waves-effect" href="../index.html" target="_self"><span class="fbtn-text fbtn-text-left">返回主页</span><span class="icon">home</span></a>
				<a class="fbtn waves-attach waves-circle waves-effect" href="http://www.lydsy.com/JudgeOnline/submitpage.php?id=4225" target="_blank"><span class="fbtn-text fbtn-text-left">提交代码</span><span class="icon">send</span></a>
				<a class="fbtn fbtn-orange waves-attach waves-circle waves-effect" href="http://www.lydsy.com/JudgeOnline/wttl/wttl.php?pid=4225" target="_blank"><span class="fbtn-text fbtn-text-left">试题讨论</span><span class="icon">chat</span></a>
				
			</div>
		</div>
	</div>

	<!-- js -->
	<script src="../js/jquery.min.js"></script>
	<script src="../js/base.min.js"></script>
	<script src="../js/project.min.js"></script>
</body>
</html>